Gardevoir day, as celebrated by Pixiv, already took place in early March.

However, Pixiv also came up with a distinct Gallade day that just happens to be today, as in:
>no. 475
> 4 x 7, 5
> 28th of fifth month

Fanart of Ralts, Kirlia, Gardevoir (Mega or regular) and Gallade is welcome. Discussions, speculations and such are welcome as well!